HP Cycle 44

🟢 6: F 6/4, 🔵❗ 8: M 6/7 current creates magnetic field

pd 8 - Quiz Today on ➕ Positive Physics unit 202: magnetism!

Today, we'll learn how moving charges create magnetic fields. We'll learn the last two right hand rules.

Then, we'll practice mass spectrometer problems by doing ➕ Positive Physics unit 203: electromagnetism "work" problems from the sections:

• right hand rule 1

• right hand rule 2

Homework: Finish these ➕ Positive Physics problems by Tuesday at 10pm. Only completion score counts. No late work will be accepted.

Optional Extra Practice: Textbook chapter 19 conceptual questions 21-24

🟩❗ 6: M 6/7, 🟦 8: T 6/8 induction & Lenz's Law

pd 6 - Quiz Today on ➕ Positive Physics unit 202: magnetism!

If moving charges produce magnetic fields, can magnetic fields move charges? Today, we'll learn how we can produce a current in a wire loop by changing the magnetic field through it. We'll introduce Lenz's Law and look at 3 (or really 4) steps:

1. 1. Is there a changing number of magnetic field lines (aka magnetic flux) in the loop of wire?

   2. How are the field lines changing? ("more/less lines to the right" for example)

   3. The induced field opposes that change. ("more lines _____" opposite #2)

   4. Use the right hand rule for the electromagnet/solenoid. (thumb = induced field, fingers curl = current)

We'll do some practice with Lenz's Law.

Watch all of "Intro to Induction and Lenz's Law," and also "Electromagnetic Induction" by Michel van Bizen from 2:31-5:10 only (and perhaps also the first 40s of the video to understand the set-up if it's not obvious).

Then, each person is assigned just one problem from "Lenz's Law Practice Numbered". The answers are provided on the worksheet in parenthesis [(cw) for clockwise, (acw) for counter- or anti-clockwise]. There is a video link provided at the top of the document if you want examples of solutions. Check the post in ✏️ Google Classroom to find your assignment. Log onto 🔄 Flipgrid using the link attached in ✏️ Google Classroom (should be able to click "Log in with Google" using your school wwprsd account, but manually create an account with your wwprsd email if you need to). And post your video solution. There's a 1 minute and 30 second maximum time for your video, but that should be plenty of time; my example video you see attached to the assignment in Flipgrid is only 45 seconds. You don't have to show your face on the video - just talk through the problem solution and show your right hand. Watch a few other peoples videos if you want or practice other problems from the document. Hit Submit on this assignment in ✏️ Google Classroom. That's it for the assignment!

Homework: Assignment due in 🔄 Flipgrid by Wednesday at 10pm.

💚 6: W* 6/9, 💙 8: W* 6/9 Faraday's Law

Then, we'll practice induction problems by doing ➕ Positive Physics unit 203: electromagnetism "work" problems from the sections:

• electromagnetic induction 1

• electromagnetic induction 2

Homework: Finish these ➕ Positive Physics problems by Thursday at 10pm. Only completion score counts. No late work will be accepted. Quiz on ➕ Positive Physics unit 203: electromagnetism on Friday. The quiz will only include sections: right hand rules 1 & 2 and electromagnetic induction 1 & 2 and will NOT include sections on transformers, generators, or motors which will be done in a couple of days.

Optional Extra Practice: textbook chapter 20 exercises #4, 6, 9, 10, and 12